Sennheiser CX 400BT True Wireless Headphones

MSRP 200 USD73% External
Keywords: dynamic-headphonesearbudsearphonesheadphonesin-earsennheisertrue-wirelesswireless-headphones

Product Gallery

Photo 0of Sennheiser CX 400BT True Wireless HeadphonesPhoto 1of Sennheiser CX 400BT True Wireless HeadphonesPhoto 2of Sennheiser CX 400BT True Wireless HeadphonesPhoto 3of Sennheiser CX 400BT True Wireless HeadphonesPhoto 4of Sennheiser CX 400BT True Wireless HeadphonesPhoto 5of Sennheiser CX 400BT True Wireless HeadphonesPhoto 6of Sennheiser CX 400BT True Wireless HeadphonesPhoto 7of Sennheiser CX 400BT True Wireless Headphones

Product Overview

Sennheiser CX 400BT are high-end true wireless earphones that share many featured debuted with the award-winning MOMENTUM True Wireless 2, including Sennheiser's 7mm dynamic drivers.
The CX 400BT True Wireless are created for an always-connected lifestyle. The 20-hour battery life with 7 hours on a single charge allows the user to wear them wherever they go. For phone calls and when using smart assistants, the earbuds feature ambient noise reduction microphones to make voice interactions sound natural and crystal clear.
With the Sennheiser Smart Control app, it is also possible to tailor the sound experience to one’s personal preference via the built-in equalizer. Support for codecs such as SBC, AAC and aptX assures exceptional sound quality with both iOS and Android mobile devices.

Ratings

What we found**

Pros
  • Excellent sound quality
  • Comfortable to wear
  • Supports aptX and Bluetooth 5.1
  • Good battery life
Cons
  • Nothing in particular

What external reviewers found***

External score 73% (not directly comparable across industries)
Pros
  • Superb sound quality
  • Excellent control app
  • Decent build quality
  • Excellent detail retrieval
Cons
  • Lacks low-bass
  • No wireless charging
  • No aptX HD
  • No LDAC or aptX-HD support
  • No aptX or Hi-Res Audio compatibility
  • Underwhelming battery life
Read More

Price Comparison

Specifications

Connectivity

Ports
USB-C
Wireless Connectivity
Bluetooth 5.1

Construction

Drivers
Sennheiser 7mm dynamic driver
Headphone Type
In-ear, closed

Dimensions

Size | Depth
Size | Height
Size | Width
Weight
2x 6g (earbud) + 37g (charging case)

Function

Bluetooth Codecs
SBC, AAC, aptX
Bluetooth Profiles
A2DP, AVRCP, HSP, HFP

Performance

Battery Life
7 h with earbuds, 20 h with charging case
Charging Time
1.5 h
Frequency Response
5 Hz - 21 kHz
Microphone Frequency Response
100 Hz - 10 kHz

Production

Availability
2020-09-15
Debut
2020-09-01

Related Products

OnePlus Buds True Wireless Earphones

OnePlus Buds True Wireless Earphones

64% External
OnePlus Buds are sleek true wireless earphones that share the same minimalist design language of other OnePlus smartphone accessories. They deliver up to 7 hours of music playback on a single charge, which is extendable to 30 hours with the charging bo...
Ultimate Ears FITS True Wireless In-Ear Headphones

Ultimate Ears FITS True Wireless In-Ear Headphones

66% External
Ultimate Ears FITS are true wireless headphones with an "instant custom fit": Thanks to the company's Lightform technology, the UE FITS are able to mold to fit each individual ear perfectly in under a minute, going beyond swappable tips. During the i...
Apple AirPods 3 True Wireless Headphones (2021)

Apple AirPods 3 True Wireless Headphones (2021)

80% External
Apple AirPods 3 are the 3rd-generation of the true wireless earphones that changed the headphone market. They newly support spatial audio and come with a number of improvements, though there is still no noise cancellation (for which one needs to pay fo...
Sennheiser MOMENTUM True Wireless 2 Earphones

Sennheiser MOMENTUM True Wireless 2 Earphones

75% External
Sennheiser MOMENTUM True Wireless 2 are premium wireless earphones with active noise cancellation powered by the company's 7mm dynamic drivers. They create outstanding stereo sound with deep bass, natural mids and clear, detailed treble. The new Ac...
Cambridge Audio Melomania Touch True Wireless Headphones

Cambridge Audio Melomania Touch True Wireless Headphones

76% External
Cambridge Melomania Touch follows the success of the Melomania 1, trading noise cancellation for larger, Graphene-enhanced drivers and longer playback time. The Melomania Touch is designed to fit in your ears comfortably and securely for long listening...
Sony WF-C500 True Wireless Headphones

Sony WF-C500 True Wireless Headphones

76% External
Sony WF-C500 are basic true wireless headphones with IPX4 water resistance and a long battery life. Available in four different colors, these more barebones headphones are targeting the more price-sensitive youth market. The WF-C500 feature 5.8mm dynam...
Yamaha TW-E3B True Wireless Headphones

Yamaha TW-E3B True Wireless Headphones

63% External
Yamaha TW-E3B are affordable true wireless headphones that replace the TW-E3A from 2020. The unusually short release interval hints at the incremental nature of this update, with the real difference between the two models being the physical design. Sti...
Bose QuietComfort In-Ear True Wireless Headphones with Active Noise Cancellation (2020)

Bose QuietComfort In-Ear True Wireless Headphones with Active Noise Cancellation (2020)

82% External
Bose QuietComfort Earbuds deliver technologies and experiences of the company's over-ear noise cancelling headphones to an in-ear design. They come with 11 levels of noise control so you can choose how much of the world you let in or keep out. The ...
Huawei FreeBuds 4i True Wireless Headphones w/ ANC (2021)

Huawei FreeBuds 4i True Wireless Headphones w/ ANC (2021)

61% External
Huawei FreeBuds 4i are midrange true wireless headphones introduced in 2021. Compared to the standard FreeBuds 4, they have a more mundane design and conventional ANC. The FreeBuds 4i have an ergonomic design conducive for relieving the pressures on th...
Razer Hammerhead True Wireless Pro Headphones w/ ANC

Razer Hammerhead True Wireless Pro Headphones w/ ANC

50% External
Razer Hammerhead True Wireless Pro are true wireless earphones with THX Certified audio and advanced hybrid active noise cancellation (ANC). The hybrid ANC in the Hammerhead True Wireless Pro targets both external and unwanted internal noise, combining...
OnePlus Buds Z True Wireless Earphones

OnePlus Buds Z True Wireless Earphones

57% External
OnePlus Buds Z are affordable true wireless earphones with a minimalist design. They deliver up to 5 hours of music playback on a single charge, which is extendable to 20 hours with the charging box. Like the OnePlus Buds, the OnePlus Buds support high...
Sennheiser CX True Wireless Headphones

Sennheiser CX True Wireless Headphones

66% External
Sennheiser CX True Wireless are premium wireless earphones based on the CX 400BT unveiled in 2020. With roughly the same set of features, the CX True Wireless are about 1/3 cheaper and boast roughly 1/4 longer battery life. Like the CX 400BT, the CX Tr...
Launch Comparison
Clear List

3rd-Party Review Videos

External Reviews

digitaltrends[1]

Reviewer score 77%
Reviewers from digitaltrends have found the following***:
The Sennheiser CX 400BT offer superb sound for their $200 price. Stereo imaging, precision, depth, and width of the soundstage are all superb. If only they had a few more bells and whistles, we'd be in true wireless earbud heaven.
Find the original article here.
Pros
  • Superb sound quality
  • Comply Foam tips
  • Comfortable fit
Cons
  • Underwhelming battery life
  • No active noise cancellation (ANC)

pcmag[2]

Reviewer score 87%
Reviewers from pcmag have found the following***:
The Sennheiser CX 400BT are some of the best-sounding true wireless in-ears we've tested. The earphones are compatible with Bluetooth 5.1, and support AAC, AptX, and SBC codecs. On tracks with intense sub-bass content, the earphones deliver powerful low-frequency response. The mic offers solid intelligibility.
Find the original article here.
Pros
  • Powerful, natural sound signature
  • Comfortable fit
  • Supports AAC, AptX, and SBC codecs
Cons
  • Noise cancellation isn’t adjustable

rtings[3]

Reviewer score 32%
Reviewers from rtings have found the following***:
The Sennheiser CX 400BT are alright for mixed use. They're fairly comfortable and are stable enough for moderate exercise. They can reduce quite a bit of mid-range sounds like ambient chatter. However, they struggle to block out bass-range noise like bus engines. Their battery life most likely won't be enough to get you through your 9-5.
Find the original article here.
Pros
  • Well-built design
  • Comfortable and stable fit
  • Good passive noise isolation performance
  • Great battery life
Cons
  • Bass-heavy soundstage
  • No stability fins
  • Lacks low-bass

t3[4]

Reviewer score 78%
Reviewers from t3 have found the following***:
The Sennheiser CX400BT are among the most capable all-rounders this sort of money can buy. Wireless connectivity is via Bluetooth 5.1, and there's support for SBC, AAC and aptX codecs. Voice assistance can be provided by either Siri or Google Assistant.
Find the original article here.
Pros
  • Excellent sound quality
  • Excellent detail retrieval
  • Decent build quality
Cons
  • No aptX HD

techradar[5]

Reviewer score 84%
Reviewers from techradar have found the following***:
The CX400BT are an articulate and naturalistic listen on the whole, and nowhere is that more apparent than when they're loading voices with character and emotional weight. The bottom end attacks with straight-edged clarity, and the decay of individual notes is well managed at the bottom of the frequency range as a whole. Up in the midrange there's an equally gratifying amount of detail retrieved and laid out for inspection. Seven-in is not the most impressive battery life a true wireless in-ear.
Find the original article here.
Pros
  • Excellent sound quality
  • Excellent control app
  • Excellent battery life
Cons
  • No aptX or Hi-Res Audio compatibility
  • No wireless charging

trustedreviews[6]

Reviewer score 78%
Reviewers from trustedreviews have found the following***:
The CX 400BT have the same 7mm drivers that feature in the MOMENTUM TW2 (which we bestowed our best true wireless award 2020) Bluetooth 5.1 is the wireless connection and despite the premium sound claims there’s no support for LDAC or aptX-HD. The headphones support Alexa, Google Assistant and Siri (though none are built in) and they’re compatible with the Sennheiser Smart Control app (Android, iOS)
Find the original article here.
Pros
  • High-fidelity stereo sound
  • Intuitive controls
  • Decent battery life
Cons
  • No LDAC or aptX-HD support

whathifi[7]

Reviewer score 78%
Reviewers from whathifi have found the following***:
Sennheiser CX 400BT wireless earbuds are a great value for money. Sound is lively and clear-cut, and relatively open presentation is infused with clarity and generously peppered with detail. Bass is taut and agile, mids are expressive and particularly open, and a crisp, present treble doesn't let the side down. However, their sparkle comes at the expense of a little refinement.
Find the original article here.
Pros
  • Gorgeous, energetic sound
  • Comfortable fit
  • Excellent battery life
Cons
  • Not for sportswear
  • Touch controls can be hit and miss

User Reviews

Comments

Please login before adding comments.

References

  1. ^ Sennheiser CX 400BT True Wireless review: Great sound, but not much else. [digitaltrends]. https://www.digitaltrends.com/headphone-reviews/sennheiser-cx-400bt-true-wireless-review/. 2020-09-11. Retrieved 2021-03-22.
  2. ^ Sennheiser CX 400BT Review. [pcmag]. https://www.pcmag.com/reviews/sennheiser-cx-400bt. 2020-10-23. Retrieved 2021-03-22.
  3. ^ Sennheiser CX 400BT True Wireless Headphones Review. [rtings]. https://www.rtings.com/headphones/reviews/sennheiser/cx-400bt-true-wireless. 2020-11-25. Retrieved 2021-03-22.
  4. ^ Sennheiser CX400BT review: True wireless earbuds that are something of a wolf in sheep’s clothing. [t3]. https://www.t3.com/reviews/sennheiser-cx400bt-review-true-wireless-earbuds-that-are-something-of-a-wolf-in-sheeps-clothing. 2020-09-01. Retrieved 2021-10-20.
  5. ^ Sennheiser CX 400BT True Wireless review. [techradar]. https://www.techradar.com/reviews/sennheiser-cx-400bt-true-wireless. 2020-09-04. Retrieved 2021-03-22.
  6. ^ Sennheiser CX 400BT Review. [trustedreviews]. https://www.trustedreviews.com/reviews/sennheiser-cx-400bt. Retrieved 2021-03-22.
  7. ^ Sennheiser CX 400BT review. [whathifi]. https://www.whathifi.com/reviews/sennheiser-cx-400bt. 2021-02-26. Retrieved 2021-03-22.

The MSRP provided on this page may not apply to all regions equally. For the current price, please refer to the Price Comparison section.

This page contains affiliate links to third-party merchants such as Amazon, eBay, and Rakuten. When you make a purchase using the supplied links, we will receive a commission.

These key takeaways ("pros" and "cons") and summaries are identified from third-party reviews. They may differ from the original texts.

<

>

x